After intercourse, the egg and sperm form a fertilized egg, and the formed fertilized egg may be implanted in about 7 days after intercourse. The trophoblast cells will start to secrete human chorionic gonadotropin only after the fertilized egg has been laid, and it takes more than 14 days after intercourse to be able to use a pregnancy test or pregnancy test to determine whether or not you are pregnant. Human chorionic gonadotropin will be secreted in the bloodstream to increase the amount of human chorionic gonadotropin after the fertilized egg has been laid and you can take a blood test for HCG to determine whether or not you are pregnant at around 10 days after intercourse. Human chorionic gonadotropin secretion increases in the pregnant woman’s blood, and then expressed in the urine increases, so the use of pregnancy test paper or pregnancy test to test to determine whether there is a pregnancy to be later than the time to measure the blood HCG.